package LC;

import java.util.HashSet;
import java.util.TreeSet;

/**
 * @ClassName LC671
 * @Description: TODO
 * @Author hl
 * @Date 2020/8/26
 * @Version V1.0
 **/
public class LC671 {
    public static void main(String[] args) {


        TreeSet<Integer> set=new TreeSet<>();
        set.add(3);
        set.add(2);
        set.add(1);
        System.out.println( set.pollFirst());
    }
}
